/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements. See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License. You may obtain a copy of the License at
 *
 *    http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.apache.kafka.server.partition;

import java.util.List;

public record OngoingReassignmentState(
        List<Integer> addingReplicas,
        List<Integer> removingReplicas,
        List<Integer> replicas
) implements AssignmentState {

    public OngoingReassignmentState {
        addingReplicas = List.copyOf(addingReplicas);
        removingReplicas = List.copyOf(removingReplicas);
        replicas = List.copyOf(replicas);
    }

    @Override
    public int replicationFactor() {
        // Keep the size of the original replicas. Replicas may also include those currently being added.
        return (int) replicas.stream().filter(r -> !addingReplicas.contains(r)).count();
    }

    @Override
    public boolean isAddingReplica(int brokerId) {
        return addingReplicas.contains(brokerId);
    }
}
